For running J!5.1 you must https://fabrikar.com/forums/index.php?wiki/update-from-github/ or include the new file manually https://fabrikar.com/forums/index.php?threads/joomla-5-1-and-fabrik-cannot-find-files-error.54473/post-285151 See also Announcements
See Announcement
We are still working on the Joomla update.
Hi HughWhat site template are you using? This was a known issue with some templates that included their own version of Bootstrap, not compatible with J!'s.
Are you running a recent github, or just the last release ZIP?
Also ... any question involving CSS or DOM formatting in general, we need a link to the page, as it's almost always going to be site / page specific.
-- hugh
Re your email request for a link to the github code.
http://fabrikar.com/forums/index.php?wiki/update-from-github/
-- hugh
If your Joomla template is overriding original Joomla bootstrap this is no question of Fabrik or updating Fabrik from GitHub.
You have to update the Joomla template.
Maybe the wrong Joomla template settings can be "reset" with custom CSS. But as Hugh says this is only possible with a link to your site.